Remove dusts and debris with a vacuum cleaner and a broom.
How to install tile on a concrete basement floor.
This is an optional step but can really benefit your tile installation in the long run.
Most tile professionals agree that attaching a cbu to a concrete floor would be more trouble than it is worth.
A concrete sealer prevents moisture from staying underneath the ceramic tiles.
Mortar is basically the adhesive that helps the tile stick to the concrete so choose the one that best suits your needs and your current situation.
Apply a layer of paint on anti fracture and waterproofing membrane material liquid rubber polymer that goes on like wet paint and dries into a flexible rubber coating on the surface to the top.
After mopping allow your concrete.
The next step is to apply a concrete sealer on the floor surface.
Step 2 cleaning the concrete flooring.
If anything it would be difficult to screw the cbu into the concrete especially with the middle layer of thin set.
Use a self mix thin set mortar for the tile installation.
Remove stubborn dust and dirt with a mop soaked in a solution of bleach and water.
Pour just about an entire bag of the dry mixture into a large bucket.
It will also provide a stronger adhesion between mortar and concrete.
Continue to mix until the texture is creamy.
Mop the entire floor area of your basement as any dirt or dust is a potential hazard to the success of your tiling job.
Add just enough water to get the dry mixture wet and begin mixing.
In short installing cement board between concrete and tile is possible.